COMPLEX FOR REARING OF RHEOPHILIC KINDS OF FISH Russian patent published in 2008 - IPC A01K61/00 

FIELD: fishery, in particular, equipment for keeping and preparing rheophilic kinds of fish for spawning.

SUBSTANCE: complex consists of three interconnected basins with water purifying chambers positioned therebetween and equipped with perforated side walls facing inward of basins, water recirculation, denitrification and water pH stabilization systems, biofilters, air compressor, and microprocessor connected to oxygen sensor. Each basin is made oval-shaped. Cone-shaped settler with drain opening is provided centrally of basin bottom. Biofilter is positioned above settler so as to define water passageway. Biofilter is made in the form of cylinder having cone-shaped lower base with inward oriented apex end and perforated upper base fixed below edge of cylinder body. Tube with propeller pump is positioned coaxially within cylinder body. Upper end of tube extends above perforated base. Cylinder body is divided into two sections, with lower section including biocharge and upper section including filter-aerator. Cylinder body has perforations provided at the level of lower section. Water recirculation system has four airlifts positioned in pairs within outer basins and equipped with water intake branch pipes and water discharge branch pipes. Water intake branch pipes and water discharge branch pipes are positioned in outer basins while two water discharge branch pipes are positioned in middle basin.

EFFECT: improved fish keeping conditions owing to regulated oxygen concentration in basins and reduced power consumed for fish keeping process.

4 cl, 1 dwg